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    Convert

    mm² → in²

    Square Millimeter
    mm²
    Square Inch
    0.0016
    in²
    Rounded result (4 decimals max)

    Formula

    1 mm² = 0.0016 in²

    Conversion sourcesTap or click to view references

    • The International System of Units (SI) — NIST Special Publication 330

      National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

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    mm² to in² quick table

    Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

    Square Millimeter (mm²)Square Inch (in²)
    0.25 mm²0.0004 in²
    0.5 mm²0.0008 in²
    1 mm²0.0016 in²
    2 mm²0.0031 in²
    5 mm²0.0078 in²
    10 mm²0.0155 in²
    25 mm²0.0388 in²
    100 mm²0.155 in²

    in² back to mm²

    Keep the reciprocal handy when double-checking calculations or undoing a conversion.

    Square Inch (in²)Square Millimeter (mm²)
    0.25 in²161.29 mm²
    0.5 in²322.58 mm²
    1 in²645.16 mm²
    2 in²1,290.32 mm²
    5 in²3,225.8 mm²
    10 in²6,451.6 mm²
    25 in²16,129 mm²
    100 in²64,516 mm²

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